Fault diagnosis instrument



FIG. 1 is a front view thereof;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof

FIG. 7 is a front-bottom-right side perspective view thereof;

FIG. 8 is a front-top-right side perspective view thereof; and,

FIG. 9 is a rear-bottom-left side perspective view thereof, with fault diagnosis instrument being in use.

The broken lines shown in the drawings represent portions of fault diagnosis instrument which form no part of the claimed design. 

CLAIM The ornamental design for fault diagnosis instrument, as shown and described. 